MOST will recall team headed Paul MacCready won 50000 Kremer Prize August 1977 flying Man-Powered Aircraft MPA over figure-8 course 20 years people over world tried failed Gossamer Condor made British industrial ist Henry Kremer told MacCready award ceremony have never life much fun money reflected later created new competition MPAs 100000 first cross 22-mile English ChanneL largest award its kind history clearly monumental chal lenge Like earlier prize rules simple qualifying flight 400 meters straight line required take-off England over 60 meters altitude land France Pilot flotation gear also required Kremer now mid-60s much younger appearance spirit expects goal achieved within five years may fact occur before article printed MacCready team set work ultimately designed built Son Gos now Albatross should have made its temptto cross English Channeland perhaps will have succeeded fore gets print case knowledge able insight its de sign fabrication will interest U Frank G Kelly samer Condor stronger lighter has higher aspect ratio main wing readily repairable transportable last feature important time came send Gossamer Condor Smithsonian National Air Space Mu seum now resides wing tip wing tip Spirit St Louis forced use hacksaw subdivide wing pieces would fit van reconstructed museum usual splices tape hose clamps team mainly same group before MacCreadys sons Parker Ty ler noted hang-glider designer Taras Kiceniuk made significant contribu tions main building tasks accom plished Kirke Leonard plastic layup Bill Watson Bryan Allen again also pilot Paul McKibben directed Ergometric studies Gossamer Albatross basically similar Gossamer Condor appear ance has technical refinements including graphite fiber reinforced plastic GFRP instead aluminum places GFRP modem material can made twice strong half heavy aluminum about 20 times expen sive control system fascinating Kevlar aramid fiber string used linkage members tension No bellcranks no pushrods jii3t string tied bows make easy adjust moving lever cockpit ailerons Continued page 120 50 Model Aviation ay Inc USWfl 5 usny IIfl1 MIOSIrUSS IS SUI TU[ 115 first test hop L R Taras Kicaniuk Bryan Alienwho powered 1O/-mile flight written Ted Ancona Paul MacCready Only basically like famous Condor Alba tross uses graphite fiber-reinforced plastic stead aluminum moat placesit half heavy twice strong 20 times expensive Weight down 70 55 lbs Inc iuoaiross Hills OH Its maiaen 111gm us conirci system nas no oeicrans pusnroosjust Keviar string tied bows make easy adjust cockpit lever controls ailerons front wing make fiat turns another lever warps wing introducing differential drag increasing lift inboard wing Condor required 33 hp level flight Albratross 25 hp OUR AIM T FLYING SPECIALIZING IN OX FF KITS AND ENGINES FOR THE COMPETITOR WE HAVE TH HOT EQUIPMENT hterprises 4 2 lack fire breathing quality AMA types 3 have adjustments make needle compression 4 can very nasty especially its cold bite fingers Whats going return old days will continue $30 gallon fuel $200 plugs $150 props lines $350 go Americans seem reviewing priorities automobiles remember 426 Hemi king its either moderate perish according authorities Probably often asked question has make Fox run suction So far hasnt totally satisfactory answer youll get either As Ive said before have seal up stock restrictor air goes around restrictor rather through Some balsa wedged will can use 5-minute epoxy little heat will make fall right out carved down piece fairly hard wood fit square opening drilled down center Stick engine drill hole spraybar Find nice cone-shaped bit Dremel make nice venturi shape both ends hardwood can extend out stock venturi give ram effect just look weird sure coat inside wood epoxy fuel soon melts venturi find uri draws just fine should can bore out next drill size sooner later youll get too big youve lost piece hardwood Go back drill size youre business Charlie Johnson 3716 Ingraham St San Diego CA 92109 CL Racing/Lee continued page 48 running well over 25000 rpm dump water Instant destruction new rod much stronger old machined out 7075-T6 aluminum has very nearly double cross-sectional area old rod its longer between centers old rod too right 050 What means case has have some milling done ports side engine rod will clear longer rod means piston wrist pin placed closer top piston means engine longer rod has less side thrust piston running well lower piston speed same rpm has translate hp slight few places engine have experienced problem previous model has rear rotor assembly old engine aluminum rotor running steel rotor pin against chromed aluminum backplate rotor milled out back side balance purposes small portion actually rubbed against backplate Due pressure fluctuations crankcase rotor pressed tightly against backplate during portion rotation during remaining portion being allowed basically float free pressed tightly against backplate would wear side opposite intake cut-out Usually wear slight didnt seem affect engine perfor mance until suddenly stopped working once usually middle finals somewhere have keep close eye backplate/rotor assemblies old engines new engine appears have fixed problem rotor steel chrome plated running against aluminum backplate should effectively stop wear experienced old engines nice part assembly will work old engines So got lucky crankshaft front end modi fied too crank has enlarged just behind front bearing clear back before nominal 375 now 467 will obviously make crank virtually unbreakable although problem have encountered older versions engines front end housing has modified slightly flat spot milled top rear bearing housing oil hole drilled through area immediately front rear bearing Obviously improved lubrication rea son Again got lucky new front end crankshaft will fit older engines ONLY complete assembly initial impressions new engine very good engine has made better Ive running K&B engines Rats ever since Ive flying new 65 Ill future Mouse Race NATS Mouse racers planning being Nats Lincoln summer should plan bringing equipment along fly though Mouse popular events parts country still provisional event isnt flown officially Nats year last unofficial Class Mouse will flown Tuesday Nats week being spon sored Orbiting Eagies Omaha Nebraska trophies possibly some merchandise coming Cox information comes Vince Mankowski Vice President District IX years Nats Control Line Category Direc tor So Mousers should come prepared event perhaps good showing will convince Nats officialdom reinstate event TR Nat Bill Wright will running TR years Nats did last year Lake Charles Only year working up new model description form somewhat different previously trying get available sent TR entrants along Nats entry packet know red tape flows slowly might possible going fly TR Nats might want contact Bill address Bill Wright 2712 Seminole Dr Indepen dance MO 64057 Bill Lee 3522 Tamarisk Lane Missouri City TX 77459 Albatross/Kelly continued page 50 canard front wing controlled causes canard roll indepen dently rest airframe Canard pitch control straightforward full-flying control surface Another lever warps main wing make flat turns introducing differential drag increased lift inboard wing overall weight reduced 70 55 lb power required maintain level flight reduced third 033 025 hp improvements did come easily new has ribs provide better airfoil contour details like using Kevlar place piano wire control system new urethane material replace conventional bicycle chain made possible small increments weight reduction taken together add up 15 lb total weight thousand lightening holes foam ribs 5 oz main wing canard 1 20 Model Aviation PLANES 1355 Er*i Road BOATS PO Box 227 CARS Pangli Center TRAINS Van Wilt ON 45196 Jan Gus *4191 2382625 WE BUY OR TRADE OLD ENGINES AND KITS propeller have D-tube construction polystyrene foam bead board leading edges main wing canard have 2-india round GFRP spars propeller has similar 1-in spar made wrapping delicate graphite cloth pre impregnated epoxy around alu minum mandrel After high temperature curing aluminum dissolved out main wing canard have 0022 diameter stainless steel wires trailing edges covering attached using what might called double-sided pressure sensitive tape tape consists single adhesive layer usual paper substrate have heard upper wing surface provides lift knowledge applied MacCready upper surface covered clear haif-mil Mylar under side has quarter-mil material way com parison MonoKote two mils thick Any modeler can relate propeller Gossamer Albatross looks like worst attempts RC sailplane wing blade has constant chord 16 balsa ribs constant chord adds inertia assist pilot/engine twohour run total span 13 feet terrible twist clearly evident unlike efforts shape intentional Bill Watson described pitch 15 degrees works out about 7 feet blade covered yellow MonoKote other yellow flight propeller turns about 90 rpm Originally planned call Gossamer Pelican changed Alba tross because condor land bird greatest wing span albatross sea bird greatest wing span term Gossamer Pelican now reserved projected sport model home builders MacCready will have plans available soon evening July 1978 tiny Shafter airport near Bakersfield sun over horizon yet dark Gossamer Albatross ready its maiden flight barely whis per wind great hangar doors opened wide craft brought out tube protrudes sides aid handling two tiny wheels like casters craft placed small wagon short trip runway bowsprit wingtips controlled various individuals using ropes avoid bumping ground looping awkward monster Out runway readied Bryan Allen pilot mounted bicycle seat immediately sealed quarter mil Mylar held double-back tape shrunk place no door Bryan fired up engine pedaling Gossa mer Albatross moved forward promptly left ground went about 100 meters its first flight half meter off ground No control problems evident end run noted wing warp lever bracket broken Paul passed roll duct tape Bryan repaired fitting craft carried farther back longer run time Bryan went good 300 meters flew about 3 meters altitude no trouble making some gentle turns feel out newly hatched fledgling landed suc cessfully happy crew parked craft hangar went out dinner following morning Gossamer Albatross rolled out sun Again almost no wind what little came other direc tion time velcro closure evident around door created let Bryan out night before craft carried down landed previously everything readied Bryan applied power make better flight suddenly pitched ward cockpit spinning propel ler wobbled slowly halt GFRP complete switch mounting set enables install battery switch minutes anywhere fuselage drilling ONE 3/16 hole! Excellent use planes helicopters boats cars attractive black nylon switch mount adaptable wall thickness up 3/8 jNo203 Noto switch mou ntU required ii Designed fit switches used today! tA PR0 C ou$hhhhlDUBRO PRODUCTS INC 480 BONNER ROAD WAUCONDA ILL 60084 August 1979 121 SAVE BUCK-ASK FOR fA lot people think Instant Glue has cost 395 1/2 oz doesnt 295 well give finest quality full quantity People try JET just wont go beck old glue -and tell friends about ALL YOU HAVE TO DO TO SAVE ONE DOlLAR ASK FOR JETI See dealer JET first rate Instant Glue sells full 1/2 oz $295 $395 1/4 oz $175 $225 ALL YQIJ HAVE TO DO RIs ASK FOR Tii TO SAVE ONE DOLLA THE SIMPLEST FASTEST AND EASIEST WAY TO MOUNT YOUR BATTERY SWITCH Two Sizes % ID 10 PRICE 2 lengths Comes ig two STUT FAIRINGS 3 Lengths fairings iiir size 225 cockpit coammn~ -r y COMES IN 3 FT LENGTHS SMALL 118 OR LARGE 114 THIS HINGE COMPLETELY SEALS CONTROL SURFACE AIR LOSS STRONG FLEXIBLE HINGE THAT IS ABLE TO MOVE ooney gapless hinges --* drive shaft broken classical failure mode tubular member under excessive torsional stress After brief discussion decided pull off propeller make hand-launched Gossa mer Glider Two assistants ran along side handles Bryan flew back hangar Paul assessed situation resolved replace drive shaft aluminum did temporarily present version has GFRP drive shaft Much additional work has done complete set spare parts has built enough build entire second aircraft Bryan has continued physical training designed peak first break weather over English channel Plans suitable hangar near Dover have abandoned since team can set up now five minutes planned move England April Im looking forward big attempt think theyll make Adventures/Harrah continued page 61 gravity seems help projected wing stab area about 2000 sq loading about 10 ounces per square foot flying surface little high weak thermals will have hunt out some boomers long flights short engine runs lighter covering little sanding in-sight weight reduc tion would bring down between 7- 8-pound figure Great thermaling al A1 Packaged 2 Ft Size AND PRICE 5195Ipkg GAP LESS HINGE SLOTTER Makes Slots 4 Sizes Balsa %-Y-Ae /4 PRICE S195 FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 Phone 503 357 2732 though doesnt take away neat sport model 9 pounds no tricks mounting Proctor hardware spring mounted set cables maintain tension 2 4 pounds usually required type slow flying plane faster planes require overcome air pressure control surfaces about 6 pounds used one-spring method others use two two-spring method allows control surface deflection both directions case inadvertently moved reducing potential damage system Proctor fittings give finishing touch scale models very functional needed Naturally already guessed half Sig lumberyard went project availability straight-grained spruce large sheets 1/16 ply made building lot easier Jugs Titebond glue some Devcon Slow Cure epoxy Wilhold R/C56 glue wind shields used put together Williams Bros inverted U spear used guide tail wheel Du-Bro wheels Fox wheel fittings rounded out ground support Well Sunday morning perfect first flight engine started right up test glides range check engine running perfect Checked high low throttle nose held vertical could offer no excuse stay ground moment truth hand Ner vous Taxi fine increased rpm went left over-corrected rudder same time parted company ground surprised about 2/3 throttle airborne about 25 feet happened original design pop-off struts came back earth moment realized heading light standard No J4 sticking out Leroys head winding up picture missed itby inches Regaining some control myself plane put slow right turn left wing panel creasing its dihedral cut throttle off managed just clear trees could keep nose up headed slow right spin gave full left rudder full up elevator hoping pop wheels wheels did hit just before nose damage minor plane major pride Repairs now process snap-off struts being re placed working screw-mounted struts go back next flight time will spent ground taxiing did fly Taylorcraft things con sidered lot achieved learned K&B 61 experiments prop tests Proctor control systems surpassed ex pectations two failings both design other pilot error lucky have little repair learned found K&B engine Taylorcraft can wonderful sport-flying oombination Thanks Sterling Peanut version great old bird we-fly can magnificent horror over have go find Diana Cream Invader/Smith continued page 69 4 Slide tubes fuselage epoxy heavily after roughing od corner file glue areas 5 File end tubes flush side fuselage secure ballast strip plastic tape Radie Installatien 1 Installation shown Kraft radio other radio used essential same structural configuration used side rails cross rails Positions may altered suit radio 2 Shape side rails fit contour fuselage Use Hobbypoxy #2 gluing area Epoxy side rails place Fabricate lay out drill cross rails braces epoxy place 3 Loose-install servos align anchor front end cables control linkages Remove servos 4 Sand center seams fuselage smooth wet-or-dry sand entire fuselage re move orange peel effect gel coat Finishpaint fuselage sand canopy bottom needed obtain good fit cut out rear canopy clear control mechan ism Install hook canopy hooks servo rails Finish paint canopy 5 One Airtronics skid other suitable skid installed Install radio hook up linkages Assemble finished tail surfaces 122 Model Aviation Winning Ideas FOURMOST specialize WINNING Ideas AVIATION JEWELRY Largest Aircraft Jewelry Selection World CUSTOM JEWELRY SPECIALISTS Interested dealers full line airplane jewelry write PO Box 56CM JAddison Dallas Texas 75001 -Ph 214 596 3505 CUSTOM TUNED ENGINES COMPETITION ACCESSORIES Cox 049L051 Specialists brochure send 1 Sc stamp Kustom Kraftsmanship Brochure Box 2699 Laguna Hills CA 92653 714 830-5162
Edition: Model Aviation - 1979/08
Page Numbers: 50, 120, 121, 122
MOST will recall team headed Paul MacCready won 50000 Kremer Prize August 1977 flying Man-Powered Aircraft MPA over figure-8 course 20 years people over world tried failed Gossamer Condor made British industrial ist Henry Kremer told MacCready award ceremony have never life much fun money reflected later created new competition MPAs 100000 first cross 22-mile English ChanneL largest award its kind history clearly monumental chal lenge Like earlier prize rules simple qualifying flight 400 meters straight line required take-off England over 60 meters altitude land France Pilot flotation gear also required Kremer now mid-60s much younger appearance spirit expects goal achieved within five years may fact occur before article printed MacCready team set work ultimately designed built Son Gos now Albatross should have made its temptto cross English Channeland perhaps will have succeeded fore gets print case knowledge able insight its de sign fabrication will interest U Frank G Kelly samer Condor stronger lighter has higher aspect ratio main wing readily repairable transportable last feature important time came send Gossamer Condor Smithsonian National Air Space Mu seum now resides wing tip wing tip Spirit St Louis forced use hacksaw subdivide wing pieces would fit van reconstructed museum usual splices tape hose clamps team mainly same group before MacCreadys sons Parker Ty ler noted hang-glider designer Taras Kiceniuk made significant contribu tions main building tasks accom plished Kirke Leonard plastic layup Bill Watson Bryan Allen again also pilot Paul McKibben directed Ergometric studies Gossamer Albatross basically similar Gossamer Condor appear ance has technical refinements including graphite fiber reinforced plastic GFRP instead aluminum places GFRP modem material can made twice strong half heavy aluminum about 20 times expen sive control system fascinating Kevlar aramid fiber string used linkage members tension No bellcranks no pushrods jii3t string tied bows make easy adjust moving lever cockpit ailerons Continued page 120 50 Model Aviation ay Inc USWfl 5 usny IIfl1 MIOSIrUSS IS SUI TU[ 115 first test hop L R Taras Kicaniuk Bryan Alienwho powered 1O/-mile flight written Ted Ancona Paul MacCready Only basically like famous Condor Alba tross uses graphite fiber-reinforced plastic stead aluminum moat placesit half heavy twice strong 20 times expensive Weight down 70 55 lbs Inc iuoaiross Hills OH Its maiaen 111gm us conirci system nas no oeicrans pusnroosjust Keviar string tied bows make easy adjust cockpit lever controls ailerons front wing make fiat turns another lever warps wing introducing differential drag increasing lift inboard wing Condor required 33 hp level flight Albratross 25 hp OUR AIM T FLYING SPECIALIZING IN OX FF KITS AND ENGINES FOR THE COMPETITOR WE HAVE TH HOT EQUIPMENT hterprises 4 2 lack fire breathing quality AMA types 3 have adjustments make needle compression 4 can very nasty especially its cold bite fingers Whats going return old days will continue $30 gallon fuel $200 plugs $150 props lines $350 go Americans seem reviewing priorities automobiles remember 426 Hemi king its either moderate perish according authorities Probably often asked question has make Fox run suction So far hasnt totally satisfactory answer youll get either As Ive said before have seal up stock restrictor air goes around restrictor rather through Some balsa wedged will can use 5-minute epoxy little heat will make fall right out carved down piece fairly hard wood fit square opening drilled down center Stick engine drill hole spraybar Find nice cone-shaped bit Dremel make nice venturi shape both ends hardwood can extend out stock venturi give ram effect just look weird sure coat inside wood epoxy fuel soon melts venturi find uri draws just fine should can bore out next drill size sooner later youll get too big youve lost piece hardwood Go back drill size youre business Charlie Johnson 3716 Ingraham St San Diego CA 92109 CL Racing/Lee continued page 48 running well over 25000 rpm dump water Instant destruction new rod much stronger old machined out 7075-T6 aluminum has very nearly double cross-sectional area old rod its longer between centers old rod too right 050 What means case has have some milling done ports side engine rod will clear longer rod means piston wrist pin placed closer top piston means engine longer rod has less side thrust piston running well lower piston speed same rpm has translate hp slight few places engine have experienced problem previous model has rear rotor assembly old engine aluminum rotor running steel rotor pin against chromed aluminum backplate rotor milled out back side balance purposes small portion actually rubbed against backplate Due pressure fluctuations crankcase rotor pressed tightly against backplate during portion rotation during remaining portion being allowed basically float free pressed tightly against backplate would wear side opposite intake cut-out Usually wear slight didnt seem affect engine perfor mance until suddenly stopped working once usually middle finals somewhere have keep close eye backplate/rotor assemblies old engines new engine appears have fixed problem rotor steel chrome plated running against aluminum backplate should effectively stop wear experienced old engines nice part assembly will work old engines So got lucky crankshaft front end modi fied too crank has enlarged just behind front bearing clear back before nominal 375 now 467 will obviously make crank virtually unbreakable although problem have encountered older versions engines front end housing has modified slightly flat spot milled top rear bearing housing oil hole drilled through area immediately front rear bearing Obviously improved lubrication rea son Again got lucky new front end crankshaft will fit older engines ONLY complete assembly initial impressions new engine very good engine has made better Ive running K&B engines Rats ever since Ive flying new 65 Ill future Mouse Race NATS Mouse racers planning being Nats Lincoln summer should plan bringing equipment along fly though Mouse popular events parts country still provisional event isnt flown officially Nats year last unofficial Class Mouse will flown Tuesday Nats week being spon sored Orbiting Eagies Omaha Nebraska trophies possibly some merchandise coming Cox information comes Vince Mankowski Vice President District IX years Nats Control Line Category Direc tor So Mousers should come prepared event perhaps good showing will convince Nats officialdom reinstate event TR Nat Bill Wright will running TR years Nats did last year Lake Charles Only year working up new model description form somewhat different previously trying get available sent TR entrants along Nats entry packet know red tape flows slowly might possible going fly TR Nats might want contact Bill address Bill Wright 2712 Seminole Dr Indepen dance MO 64057 Bill Lee 3522 Tamarisk Lane Missouri City TX 77459 Albatross/Kelly continued page 50 canard front wing controlled causes canard roll indepen dently rest airframe Canard pitch control straightforward full-flying control surface Another lever warps main wing make flat turns introducing differential drag increased lift inboard wing overall weight reduced 70 55 lb power required maintain level flight reduced third 033 025 hp improvements did come easily new has ribs provide better airfoil contour details like using Kevlar place piano wire control system new urethane material replace conventional bicycle chain made possible small increments weight reduction taken together add up 15 lb total weight thousand lightening holes foam ribs 5 oz main wing canard 1 20 Model Aviation PLANES 1355 Er*i Road BOATS PO Box 227 CARS Pangli Center TRAINS Van Wilt ON 45196 Jan Gus *4191 2382625 WE BUY OR TRADE OLD ENGINES AND KITS propeller have D-tube construction polystyrene foam bead board leading edges main wing canard have 2-india round GFRP spars propeller has similar 1-in spar made wrapping delicate graphite cloth pre impregnated epoxy around alu minum mandrel After high temperature curing aluminum dissolved out main wing canard have 0022 diameter stainless steel wires trailing edges covering attached using what might called double-sided pressure sensitive tape tape consists single adhesive layer usual paper substrate have heard upper wing surface provides lift knowledge applied MacCready upper surface covered clear haif-mil Mylar under side has quarter-mil material way com parison MonoKote two mils thick Any modeler can relate propeller Gossamer Albatross looks like worst attempts RC sailplane wing blade has constant chord 16 balsa ribs constant chord adds inertia assist pilot/engine twohour run total span 13 feet terrible twist clearly evident unlike efforts shape intentional Bill Watson described pitch 15 degrees works out about 7 feet blade covered yellow MonoKote other yellow flight propeller turns about 90 rpm Originally planned call Gossamer Pelican changed Alba tross because condor land bird greatest wing span albatross sea bird greatest wing span term Gossamer Pelican now reserved projected sport model home builders MacCready will have plans available soon evening July 1978 tiny Shafter airport near Bakersfield sun over horizon yet dark Gossamer Albatross ready its maiden flight barely whis per wind great hangar doors opened wide craft brought out tube protrudes sides aid handling two tiny wheels like casters craft placed small wagon short trip runway bowsprit wingtips controlled various individuals using ropes avoid bumping ground looping awkward monster Out runway readied Bryan Allen pilot mounted bicycle seat immediately sealed quarter mil Mylar held double-back tape shrunk place no door Bryan fired up engine pedaling Gossa mer Albatross moved forward promptly left ground went about 100 meters its first flight half meter off ground No control problems evident end run noted wing warp lever bracket broken Paul passed roll duct tape Bryan repaired fitting craft carried farther back longer run time Bryan went good 300 meters flew about 3 meters altitude no trouble making some gentle turns feel out newly hatched fledgling landed suc cessfully happy crew parked craft hangar went out dinner following morning Gossamer Albatross rolled out sun Again almost no wind what little came other direc tion time velcro closure evident around door created let Bryan out night before craft carried down landed previously everything readied Bryan applied power make better flight suddenly pitched ward cockpit spinning propel ler wobbled slowly halt GFRP complete switch mounting set enables install battery switch minutes anywhere fuselage drilling ONE 3/16 hole! Excellent use planes helicopters boats cars attractive black nylon switch mount adaptable wall thickness up 3/8 jNo203 Noto switch mou ntU required ii Designed fit switches used today! tA PR0 C ou$hhhhlDUBRO PRODUCTS INC 480 BONNER ROAD WAUCONDA ILL 60084 August 1979 121 SAVE BUCK-ASK FOR fA lot people think Instant Glue has cost 395 1/2 oz doesnt 295 well give finest quality full quantity People try JET just wont go beck old glue -and tell friends about ALL YOU HAVE TO DO TO SAVE ONE DOlLAR ASK FOR JETI See dealer JET first rate Instant Glue sells full 1/2 oz $295 $395 1/4 oz $175 $225 ALL YQIJ HAVE TO DO RIs ASK FOR Tii TO SAVE ONE DOLLA THE SIMPLEST FASTEST AND EASIEST WAY TO MOUNT YOUR BATTERY SWITCH Two Sizes % ID 10 PRICE 2 lengths Comes ig two STUT FAIRINGS 3 Lengths fairings iiir size 225 cockpit coammn~ -r y COMES IN 3 FT LENGTHS SMALL 118 OR LARGE 114 THIS HINGE COMPLETELY SEALS CONTROL SURFACE AIR LOSS STRONG FLEXIBLE HINGE THAT IS ABLE TO MOVE ooney gapless hinges --* drive shaft broken classical failure mode tubular member under excessive torsional stress After brief discussion decided pull off propeller make hand-launched Gossa mer Glider Two assistants ran along side handles Bryan flew back hangar Paul assessed situation resolved replace drive shaft aluminum did temporarily present version has GFRP drive shaft Much additional work has done complete set spare parts has built enough build entire second aircraft Bryan has continued physical training designed peak first break weather over English channel Plans suitable hangar near Dover have abandoned since team can set up now five minutes planned move England April Im looking forward big attempt think theyll make Adventures/Harrah continued page 61 gravity seems help projected wing stab area about 2000 sq loading about 10 ounces per square foot flying surface little high weak thermals will have hunt out some boomers long flights short engine runs lighter covering little sanding in-sight weight reduc tion would bring down between 7- 8-pound figure Great thermaling al A1 Packaged 2 Ft Size AND PRICE 5195Ipkg GAP LESS HINGE SLOTTER Makes Slots 4 Sizes Balsa %-Y-Ae /4 PRICE S195 FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 Phone 503 357 2732 though doesnt take away neat sport model 9 pounds no tricks mounting Proctor hardware spring mounted set cables maintain tension 2 4 pounds usually required type slow flying plane faster planes require overcome air pressure control surfaces about 6 pounds used one-spring method others use two two-spring method allows control surface deflection both directions case inadvertently moved reducing potential damage system Proctor fittings give finishing touch scale models very functional needed Naturally already guessed half Sig lumberyard went project availability straight-grained spruce large sheets 1/16 ply made building lot easier Jugs Titebond glue some Devcon Slow Cure epoxy Wilhold R/C56 glue wind shields used put together Williams Bros inverted U spear used guide tail wheel Du-Bro wheels Fox wheel fittings rounded out ground support Well Sunday morning perfect first flight engine started right up test glides range check engine running perfect Checked high low throttle nose held vertical could offer no excuse stay ground moment truth hand Ner vous Taxi fine increased rpm went left over-corrected rudder same time parted company ground surprised about 2/3 throttle airborne about 25 feet happened original design pop-off struts came back earth moment realized heading light standard No J4 sticking out Leroys head winding up picture missed itby inches Regaining some control myself plane put slow right turn left wing panel creasing its dihedral cut throttle off managed just clear trees could keep nose up headed slow right spin gave full left rudder full up elevator hoping pop wheels wheels did hit just before nose damage minor plane major pride Repairs now process snap-off struts being re placed working screw-mounted struts go back next flight time will spent ground taxiing did fly Taylorcraft things con sidered lot achieved learned K&B 61 experiments prop tests Proctor control systems surpassed ex pectations two failings both design other pilot error lucky have little repair learned found K&B engine Taylorcraft can wonderful sport-flying oombination Thanks Sterling Peanut version great old bird we-fly can magnificent horror over have go find Diana Cream Invader/Smith continued page 69 4 Slide tubes fuselage epoxy heavily after roughing od corner file glue areas 5 File end tubes flush side fuselage secure ballast strip plastic tape Radie Installatien 1 Installation shown Kraft radio other radio used essential same structural configuration used side rails cross rails Positions may altered suit radio 2 Shape side rails fit contour fuselage Use Hobbypoxy #2 gluing area Epoxy side rails place Fabricate lay out drill cross rails braces epoxy place 3 Loose-install servos align anchor front end cables control linkages Remove servos 4 Sand center seams fuselage smooth wet-or-dry sand entire fuselage re move orange peel effect gel coat Finishpaint fuselage sand canopy bottom needed obtain good fit cut out rear canopy clear control mechan ism Install hook canopy hooks servo rails Finish paint canopy 5 One Airtronics skid other suitable skid installed Install radio hook up linkages Assemble finished tail surfaces 122 Model Aviation Winning Ideas FOURMOST specialize WINNING Ideas AVIATION JEWELRY Largest Aircraft Jewelry Selection World CUSTOM JEWELRY SPECIALISTS Interested dealers full line airplane jewelry write PO Box 56CM JAddison Dallas Texas 75001 -Ph 214 596 3505 CUSTOM TUNED ENGINES COMPETITION ACCESSORIES Cox 049L051 Specialists brochure send 1 Sc stamp Kustom Kraftsmanship Brochure Box 2699 Laguna Hills CA 92653 714 830-5162
Edition: Model Aviation - 1979/08
Page Numbers: 50, 120, 121, 122
MOST will recall team headed Paul MacCready won 50000 Kremer Prize August 1977 flying Man-Powered Aircraft MPA over figure-8 course 20 years people over world tried failed Gossamer Condor made British industrial ist Henry Kremer told MacCready award ceremony have never life much fun money reflected later created new competition MPAs 100000 first cross 22-mile English ChanneL largest award its kind history clearly monumental chal lenge Like earlier prize rules simple qualifying flight 400 meters straight line required take-off England over 60 meters altitude land France Pilot flotation gear also required Kremer now mid-60s much younger appearance spirit expects goal achieved within five years may fact occur before article printed MacCready team set work ultimately designed built Son Gos now Albatross should have made its temptto cross English Channeland perhaps will have succeeded fore gets print case knowledge able insight its de sign fabrication will interest U Frank G Kelly samer Condor stronger lighter has higher aspect ratio main wing readily repairable transportable last feature important time came send Gossamer Condor Smithsonian National Air Space Mu seum now resides wing tip wing tip Spirit St Louis forced use hacksaw subdivide wing pieces would fit van reconstructed museum usual splices tape hose clamps team mainly same group before MacCreadys sons Parker Ty ler noted hang-glider designer Taras Kiceniuk made significant contribu tions main building tasks accom plished Kirke Leonard plastic layup Bill Watson Bryan Allen again also pilot Paul McKibben directed Ergometric studies Gossamer Albatross basically similar Gossamer Condor appear ance has technical refinements including graphite fiber reinforced plastic GFRP instead aluminum places GFRP modem material can made twice strong half heavy aluminum about 20 times expen sive control system fascinating Kevlar aramid fiber string used linkage members tension No bellcranks no pushrods jii3t string tied bows make easy adjust moving lever cockpit ailerons Continued page 120 50 Model Aviation ay Inc USWfl 5 usny IIfl1 MIOSIrUSS IS SUI TU[ 115 first test hop L R Taras Kicaniuk Bryan Alienwho powered 1O/-mile flight written Ted Ancona Paul MacCready Only basically like famous Condor Alba tross uses graphite fiber-reinforced plastic stead aluminum moat placesit half heavy twice strong 20 times expensive Weight down 70 55 lbs Inc iuoaiross Hills OH Its maiaen 111gm us conirci system nas no oeicrans pusnroosjust Keviar string tied bows make easy adjust cockpit lever controls ailerons front wing make fiat turns another lever warps wing introducing differential drag increasing lift inboard wing Condor required 33 hp level flight Albratross 25 hp OUR AIM T FLYING SPECIALIZING IN OX FF KITS AND ENGINES FOR THE COMPETITOR WE HAVE TH HOT EQUIPMENT hterprises 4 2 lack fire breathing quality AMA types 3 have adjustments make needle compression 4 can very nasty especially its cold bite fingers Whats going return old days will continue $30 gallon fuel $200 plugs $150 props lines $350 go Americans seem reviewing priorities automobiles remember 426 Hemi king its either moderate perish according authorities Probably often asked question has make Fox run suction So far hasnt totally satisfactory answer youll get either As Ive said before have seal up stock restrictor air goes around restrictor rather through Some balsa wedged will can use 5-minute epoxy little heat will make fall right out carved down piece fairly hard wood fit square opening drilled down center Stick engine drill hole spraybar Find nice cone-shaped bit Dremel make nice venturi shape both ends hardwood can extend out stock venturi give ram effect just look weird sure coat inside wood epoxy fuel soon melts venturi find uri draws just fine should can bore out next drill size sooner later youll get too big youve lost piece hardwood Go back drill size youre business Charlie Johnson 3716 Ingraham St San Diego CA 92109 CL Racing/Lee continued page 48 running well over 25000 rpm dump water Instant destruction new rod much stronger old machined out 7075-T6 aluminum has very nearly double cross-sectional area old rod its longer between centers old rod too right 050 What means case has have some milling done ports side engine rod will clear longer rod means piston wrist pin placed closer top piston means engine longer rod has less side thrust piston running well lower piston speed same rpm has translate hp slight few places engine have experienced problem previous model has rear rotor assembly old engine aluminum rotor running steel rotor pin against chromed aluminum backplate rotor milled out back side balance purposes small portion actually rubbed against backplate Due pressure fluctuations crankcase rotor pressed tightly against backplate during portion rotation during remaining portion being allowed basically float free pressed tightly against backplate would wear side opposite intake cut-out Usually wear slight didnt seem affect engine perfor mance until suddenly stopped working once usually middle finals somewhere have keep close eye backplate/rotor assemblies old engines new engine appears have fixed problem rotor steel chrome plated running against aluminum backplate should effectively stop wear experienced old engines nice part assembly will work old engines So got lucky crankshaft front end modi fied too crank has enlarged just behind front bearing clear back before nominal 375 now 467 will obviously make crank virtually unbreakable although problem have encountered older versions engines front end housing has modified slightly flat spot milled top rear bearing housing oil hole drilled through area immediately front rear bearing Obviously improved lubrication rea son Again got lucky new front end crankshaft will fit older engines ONLY complete assembly initial impressions new engine very good engine has made better Ive running K&B engines Rats ever since Ive flying new 65 Ill future Mouse Race NATS Mouse racers planning being Nats Lincoln summer should plan bringing equipment along fly though Mouse popular events parts country still provisional event isnt flown officially Nats year last unofficial Class Mouse will flown Tuesday Nats week being spon sored Orbiting Eagies Omaha Nebraska trophies possibly some merchandise coming Cox information comes Vince Mankowski Vice President District IX years Nats Control Line Category Direc tor So Mousers should come prepared event perhaps good showing will convince Nats officialdom reinstate event TR Nat Bill Wright will running TR years Nats did last year Lake Charles Only year working up new model description form somewhat different previously trying get available sent TR entrants along Nats entry packet know red tape flows slowly might possible going fly TR Nats might want contact Bill address Bill Wright 2712 Seminole Dr Indepen dance MO 64057 Bill Lee 3522 Tamarisk Lane Missouri City TX 77459 Albatross/Kelly continued page 50 canard front wing controlled causes canard roll indepen dently rest airframe Canard pitch control straightforward full-flying control surface Another lever warps main wing make flat turns introducing differential drag increased lift inboard wing overall weight reduced 70 55 lb power required maintain level flight reduced third 033 025 hp improvements did come easily new has ribs provide better airfoil contour details like using Kevlar place piano wire control system new urethane material replace conventional bicycle chain made possible small increments weight reduction taken together add up 15 lb total weight thousand lightening holes foam ribs 5 oz main wing canard 1 20 Model Aviation PLANES 1355 Er*i Road BOATS PO Box 227 CARS Pangli Center TRAINS Van Wilt ON 45196 Jan Gus *4191 2382625 WE BUY OR TRADE OLD ENGINES AND KITS propeller have D-tube construction polystyrene foam bead board leading edges main wing canard have 2-india round GFRP spars propeller has similar 1-in spar made wrapping delicate graphite cloth pre impregnated epoxy around alu minum mandrel After high temperature curing aluminum dissolved out main wing canard have 0022 diameter stainless steel wires trailing edges covering attached using what might called double-sided pressure sensitive tape tape consists single adhesive layer usual paper substrate have heard upper wing surface provides lift knowledge applied MacCready upper surface covered clear haif-mil Mylar under side has quarter-mil material way com parison MonoKote two mils thick Any modeler can relate propeller Gossamer Albatross looks like worst attempts RC sailplane wing blade has constant chord 16 balsa ribs constant chord adds inertia assist pilot/engine twohour run total span 13 feet terrible twist clearly evident unlike efforts shape intentional Bill Watson described pitch 15 degrees works out about 7 feet blade covered yellow MonoKote other yellow flight propeller turns about 90 rpm Originally planned call Gossamer Pelican changed Alba tross because condor land bird greatest wing span albatross sea bird greatest wing span term Gossamer Pelican now reserved projected sport model home builders MacCready will have plans available soon evening July 1978 tiny Shafter airport near Bakersfield sun over horizon yet dark Gossamer Albatross ready its maiden flight barely whis per wind great hangar doors opened wide craft brought out tube protrudes sides aid handling two tiny wheels like casters craft placed small wagon short trip runway bowsprit wingtips controlled various individuals using ropes avoid bumping ground looping awkward monster Out runway readied Bryan Allen pilot mounted bicycle seat immediately sealed quarter mil Mylar held double-back tape shrunk place no door Bryan fired up engine pedaling Gossa mer Albatross moved forward promptly left ground went about 100 meters its first flight half meter off ground No control problems evident end run noted wing warp lever bracket broken Paul passed roll duct tape Bryan repaired fitting craft carried farther back longer run time Bryan went good 300 meters flew about 3 meters altitude no trouble making some gentle turns feel out newly hatched fledgling landed suc cessfully happy crew parked craft hangar went out dinner following morning Gossamer Albatross rolled out sun Again almost no wind what little came other direc tion time velcro closure evident around door created let Bryan out night before craft carried down landed previously everything readied Bryan applied power make better flight suddenly pitched ward cockpit spinning propel ler wobbled slowly halt GFRP complete switch mounting set enables install battery switch minutes anywhere fuselage drilling ONE 3/16 hole! Excellent use planes helicopters boats cars attractive black nylon switch mount adaptable wall thickness up 3/8 jNo203 Noto switch mou ntU required ii Designed fit switches used today! tA PR0 C ou$hhhhlDUBRO PRODUCTS INC 480 BONNER ROAD WAUCONDA ILL 60084 August 1979 121 SAVE BUCK-ASK FOR fA lot people think Instant Glue has cost 395 1/2 oz doesnt 295 well give finest quality full quantity People try JET just wont go beck old glue -and tell friends about ALL YOU HAVE TO DO TO SAVE ONE DOlLAR ASK FOR JETI See dealer JET first rate Instant Glue sells full 1/2 oz $295 $395 1/4 oz $175 $225 ALL YQIJ HAVE TO DO RIs ASK FOR Tii TO SAVE ONE DOLLA THE SIMPLEST FASTEST AND EASIEST WAY TO MOUNT YOUR BATTERY SWITCH Two Sizes % ID 10 PRICE 2 lengths Comes ig two STUT FAIRINGS 3 Lengths fairings iiir size 225 cockpit coammn~ -r y COMES IN 3 FT LENGTHS SMALL 118 OR LARGE 114 THIS HINGE COMPLETELY SEALS CONTROL SURFACE AIR LOSS STRONG FLEXIBLE HINGE THAT IS ABLE TO MOVE ooney gapless hinges --* drive shaft broken classical failure mode tubular member under excessive torsional stress After brief discussion decided pull off propeller make hand-launched Gossa mer Glider Two assistants ran along side handles Bryan flew back hangar Paul assessed situation resolved replace drive shaft aluminum did temporarily present version has GFRP drive shaft Much additional work has done complete set spare parts has built enough build entire second aircraft Bryan has continued physical training designed peak first break weather over English channel Plans suitable hangar near Dover have abandoned since team can set up now five minutes planned move England April Im looking forward big attempt think theyll make Adventures/Harrah continued page 61 gravity seems help projected wing stab area about 2000 sq loading about 10 ounces per square foot flying surface little high weak thermals will have hunt out some boomers long flights short engine runs lighter covering little sanding in-sight weight reduc tion would bring down between 7- 8-pound figure Great thermaling al A1 Packaged 2 Ft Size AND PRICE 5195Ipkg GAP LESS HINGE SLOTTER Makes Slots 4 Sizes Balsa %-Y-Ae /4 PRICE S195 FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 Phone 503 357 2732 though doesnt take away neat sport model 9 pounds no tricks mounting Proctor hardware spring mounted set cables maintain tension 2 4 pounds usually required type slow flying plane faster planes require overcome air pressure control surfaces about 6 pounds used one-spring method others use two two-spring method allows control surface deflection both directions case inadvertently moved reducing potential damage system Proctor fittings give finishing touch scale models very functional needed Naturally already guessed half Sig lumberyard went project availability straight-grained spruce large sheets 1/16 ply made building lot easier Jugs Titebond glue some Devcon Slow Cure epoxy Wilhold R/C56 glue wind shields used put together Williams Bros inverted U spear used guide tail wheel Du-Bro wheels Fox wheel fittings rounded out ground support Well Sunday morning perfect first flight engine started right up test glides range check engine running perfect Checked high low throttle nose held vertical could offer no excuse stay ground moment truth hand Ner vous Taxi fine increased rpm went left over-corrected rudder same time parted company ground surprised about 2/3 throttle airborne about 25 feet happened original design pop-off struts came back earth moment realized heading light standard No J4 sticking out Leroys head winding up picture missed itby inches Regaining some control myself plane put slow right turn left wing panel creasing its dihedral cut throttle off managed just clear trees could keep nose up headed slow right spin gave full left rudder full up elevator hoping pop wheels wheels did hit just before nose damage minor plane major pride Repairs now process snap-off struts being re placed working screw-mounted struts go back next flight time will spent ground taxiing did fly Taylorcraft things con sidered lot achieved learned K&B 61 experiments prop tests Proctor control systems surpassed ex pectations two failings both design other pilot error lucky have little repair learned found K&B engine Taylorcraft can wonderful sport-flying oombination Thanks Sterling Peanut version great old bird we-fly can magnificent horror over have go find Diana Cream Invader/Smith continued page 69 4 Slide tubes fuselage epoxy heavily after roughing od corner file glue areas 5 File end tubes flush side fuselage secure ballast strip plastic tape Radie Installatien 1 Installation shown Kraft radio other radio used essential same structural configuration used side rails cross rails Positions may altered suit radio 2 Shape side rails fit contour fuselage Use Hobbypoxy #2 gluing area Epoxy side rails place Fabricate lay out drill cross rails braces epoxy place 3 Loose-install servos align anchor front end cables control linkages Remove servos 4 Sand center seams fuselage smooth wet-or-dry sand entire fuselage re move orange peel effect gel coat Finishpaint fuselage sand canopy bottom needed obtain good fit cut out rear canopy clear control mechan ism Install hook canopy hooks servo rails Finish paint canopy 5 One Airtronics skid other suitable skid installed Install radio hook up linkages Assemble finished tail surfaces 122 Model Aviation Winning Ideas FOURMOST specialize WINNING Ideas AVIATION JEWELRY Largest Aircraft Jewelry Selection World CUSTOM JEWELRY SPECIALISTS Interested dealers full line airplane jewelry write PO Box 56CM JAddison Dallas Texas 75001 -Ph 214 596 3505 CUSTOM TUNED ENGINES COMPETITION ACCESSORIES Cox 049L051 Specialists brochure send 1 Sc stamp Kustom Kraftsmanship Brochure Box 2699 Laguna Hills CA 92653 714 830-5162
Edition: Model Aviation - 1979/08
Page Numbers: 50, 120, 121, 122
MOST will recall team headed Paul MacCready won 50000 Kremer Prize August 1977 flying Man-Powered Aircraft MPA over figure-8 course 20 years people over world tried failed Gossamer Condor made British industrial ist Henry Kremer told MacCready award ceremony have never life much fun money reflected later created new competition MPAs 100000 first cross 22-mile English ChanneL largest award its kind history clearly monumental chal lenge Like earlier prize rules simple qualifying flight 400 meters straight line required take-off England over 60 meters altitude land France Pilot flotation gear also required Kremer now mid-60s much younger appearance spirit expects goal achieved within five years may fact occur before article printed MacCready team set work ultimately designed built Son Gos now Albatross should have made its temptto cross English Channeland perhaps will have succeeded fore gets print case knowledge able insight its de sign fabrication will interest U Frank G Kelly samer Condor stronger lighter has higher aspect ratio main wing readily repairable transportable last feature important time came send Gossamer Condor Smithsonian National Air Space Mu seum now resides wing tip wing tip Spirit St Louis forced use hacksaw subdivide wing pieces would fit van reconstructed museum usual splices tape hose clamps team mainly same group before MacCreadys sons Parker Ty ler noted hang-glider designer Taras Kiceniuk made significant contribu tions main building tasks accom plished Kirke Leonard plastic layup Bill Watson Bryan Allen again also pilot Paul McKibben directed Ergometric studies Gossamer Albatross basically similar Gossamer Condor appear ance has technical refinements including graphite fiber reinforced plastic GFRP instead aluminum places GFRP modem material can made twice strong half heavy aluminum about 20 times expen sive control system fascinating Kevlar aramid fiber string used linkage members tension No bellcranks no pushrods jii3t string tied bows make easy adjust moving lever cockpit ailerons Continued page 120 50 Model Aviation ay Inc USWfl 5 usny IIfl1 MIOSIrUSS IS SUI TU[ 115 first test hop L R Taras Kicaniuk Bryan Alienwho powered 1O/-mile flight written Ted Ancona Paul MacCready Only basically like famous Condor Alba tross uses graphite fiber-reinforced plastic stead aluminum moat placesit half heavy twice strong 20 times expensive Weight down 70 55 lbs Inc iuoaiross Hills OH Its maiaen 111gm us conirci system nas no oeicrans pusnroosjust Keviar string tied bows make easy adjust cockpit lever controls ailerons front wing make fiat turns another lever warps wing introducing differential drag increasing lift inboard wing Condor required 33 hp level flight Albratross 25 hp OUR AIM T FLYING SPECIALIZING IN OX FF KITS AND ENGINES FOR THE COMPETITOR WE HAVE TH HOT EQUIPMENT hterprises 4 2 lack fire breathing quality AMA types 3 have adjustments make needle compression 4 can very nasty especially its cold bite fingers Whats going return old days will continue $30 gallon fuel $200 plugs $150 props lines $350 go Americans seem reviewing priorities automobiles remember 426 Hemi king its either moderate perish according authorities Probably often asked question has make Fox run suction So far hasnt totally satisfactory answer youll get either As Ive said before have seal up stock restrictor air goes around restrictor rather through Some balsa wedged will can use 5-minute epoxy little heat will make fall right out carved down piece fairly hard wood fit square opening drilled down center Stick engine drill hole spraybar Find nice cone-shaped bit Dremel make nice venturi shape both ends hardwood can extend out stock venturi give ram effect just look weird sure coat inside wood epoxy fuel soon melts venturi find uri draws just fine should can bore out next drill size sooner later youll get too big youve lost piece hardwood Go back drill size youre business Charlie Johnson 3716 Ingraham St San Diego CA 92109 CL Racing/Lee continued page 48 running well over 25000 rpm dump water Instant destruction new rod much stronger old machined out 7075-T6 aluminum has very nearly double cross-sectional area old rod its longer between centers old rod too right 050 What means case has have some milling done ports side engine rod will clear longer rod means piston wrist pin placed closer top piston means engine longer rod has less side thrust piston running well lower piston speed same rpm has translate hp slight few places engine have experienced problem previous model has rear rotor assembly old engine aluminum rotor running steel rotor pin against chromed aluminum backplate rotor milled out back side balance purposes small portion actually rubbed against backplate Due pressure fluctuations crankcase rotor pressed tightly against backplate during portion rotation during remaining portion being allowed basically float free pressed tightly against backplate would wear side opposite intake cut-out Usually wear slight didnt seem affect engine perfor mance until suddenly stopped working once usually middle finals somewhere have keep close eye backplate/rotor assemblies old engines new engine appears have fixed problem rotor steel chrome plated running against aluminum backplate should effectively stop wear experienced old engines nice part assembly will work old engines So got lucky crankshaft front end modi fied too crank has enlarged just behind front bearing clear back before nominal 375 now 467 will obviously make crank virtually unbreakable although problem have encountered older versions engines front end housing has modified slightly flat spot milled top rear bearing housing oil hole drilled through area immediately front rear bearing Obviously improved lubrication rea son Again got lucky new front end crankshaft will fit older engines ONLY complete assembly initial impressions new engine very good engine has made better Ive running K&B engines Rats ever since Ive flying new 65 Ill future Mouse Race NATS Mouse racers planning being Nats Lincoln summer should plan bringing equipment along fly though Mouse popular events parts country still provisional event isnt flown officially Nats year last unofficial Class Mouse will flown Tuesday Nats week being spon sored Orbiting Eagies Omaha Nebraska trophies possibly some merchandise coming Cox information comes Vince Mankowski Vice President District IX years Nats Control Line Category Direc tor So Mousers should come prepared event perhaps good showing will convince Nats officialdom reinstate event TR Nat Bill Wright will running TR years Nats did last year Lake Charles Only year working up new model description form somewhat different previously trying get available sent TR entrants along Nats entry packet know red tape flows slowly might possible going fly TR Nats might want contact Bill address Bill Wright 2712 Seminole Dr Indepen dance MO 64057 Bill Lee 3522 Tamarisk Lane Missouri City TX 77459 Albatross/Kelly continued page 50 canard front wing controlled causes canard roll indepen dently rest airframe Canard pitch control straightforward full-flying control surface Another lever warps main wing make flat turns introducing differential drag increased lift inboard wing overall weight reduced 70 55 lb power required maintain level flight reduced third 033 025 hp improvements did come easily new has ribs provide better airfoil contour details like using Kevlar place piano wire control system new urethane material replace conventional bicycle chain made possible small increments weight reduction taken together add up 15 lb total weight thousand lightening holes foam ribs 5 oz main wing canard 1 20 Model Aviation PLANES 1355 Er*i Road BOATS PO Box 227 CARS Pangli Center TRAINS Van Wilt ON 45196 Jan Gus *4191 2382625 WE BUY OR TRADE OLD ENGINES AND KITS propeller have D-tube construction polystyrene foam bead board leading edges main wing canard have 2-india round GFRP spars propeller has similar 1-in spar made wrapping delicate graphite cloth pre impregnated epoxy around alu minum mandrel After high temperature curing aluminum dissolved out main wing canard have 0022 diameter stainless steel wires trailing edges covering attached using what might called double-sided pressure sensitive tape tape consists single adhesive layer usual paper substrate have heard upper wing surface provides lift knowledge applied MacCready upper surface covered clear haif-mil Mylar under side has quarter-mil material way com parison MonoKote two mils thick Any modeler can relate propeller Gossamer Albatross looks like worst attempts RC sailplane wing blade has constant chord 16 balsa ribs constant chord adds inertia assist pilot/engine twohour run total span 13 feet terrible twist clearly evident unlike efforts shape intentional Bill Watson described pitch 15 degrees works out about 7 feet blade covered yellow MonoKote other yellow flight propeller turns about 90 rpm Originally planned call Gossamer Pelican changed Alba tross because condor land bird greatest wing span albatross sea bird greatest wing span term Gossamer Pelican now reserved projected sport model home builders MacCready will have plans available soon evening July 1978 tiny Shafter airport near Bakersfield sun over horizon yet dark Gossamer Albatross ready its maiden flight barely whis per wind great hangar doors opened wide craft brought out tube protrudes sides aid handling two tiny wheels like casters craft placed small wagon short trip runway bowsprit wingtips controlled various individuals using ropes avoid bumping ground looping awkward monster Out runway readied Bryan Allen pilot mounted bicycle seat immediately sealed quarter mil Mylar held double-back tape shrunk place no door Bryan fired up engine pedaling Gossa mer Albatross moved forward promptly left ground went about 100 meters its first flight half meter off ground No control problems evident end run noted wing warp lever bracket broken Paul passed roll duct tape Bryan repaired fitting craft carried farther back longer run time Bryan went good 300 meters flew about 3 meters altitude no trouble making some gentle turns feel out newly hatched fledgling landed suc cessfully happy crew parked craft hangar went out dinner following morning Gossamer Albatross rolled out sun Again almost no wind what little came other direc tion time velcro closure evident around door created let Bryan out night before craft carried down landed previously everything readied Bryan applied power make better flight suddenly pitched ward cockpit spinning propel ler wobbled slowly halt GFRP complete switch mounting set enables install battery switch minutes anywhere fuselage drilling ONE 3/16 hole! Excellent use planes helicopters boats cars attractive black nylon switch mount adaptable wall thickness up 3/8 jNo203 Noto switch mou ntU required ii Designed fit switches used today! tA PR0 C ou$hhhhlDUBRO PRODUCTS INC 480 BONNER ROAD WAUCONDA ILL 60084 August 1979 121 SAVE BUCK-ASK FOR fA lot people think Instant Glue has cost 395 1/2 oz doesnt 295 well give finest quality full quantity People try JET just wont go beck old glue -and tell friends about ALL YOU HAVE TO DO TO SAVE ONE DOlLAR ASK FOR JETI See dealer JET first rate Instant Glue sells full 1/2 oz $295 $395 1/4 oz $175 $225 ALL YQIJ HAVE TO DO RIs ASK FOR Tii TO SAVE ONE DOLLA THE SIMPLEST FASTEST AND EASIEST WAY TO MOUNT YOUR BATTERY SWITCH Two Sizes % ID 10 PRICE 2 lengths Comes ig two STUT FAIRINGS 3 Lengths fairings iiir size 225 cockpit coammn~ -r y COMES IN 3 FT LENGTHS SMALL 118 OR LARGE 114 THIS HINGE COMPLETELY SEALS CONTROL SURFACE AIR LOSS STRONG FLEXIBLE HINGE THAT IS ABLE TO MOVE ooney gapless hinges --* drive shaft broken classical failure mode tubular member under excessive torsional stress After brief discussion decided pull off propeller make hand-launched Gossa mer Glider Two assistants ran along side handles Bryan flew back hangar Paul assessed situation resolved replace drive shaft aluminum did temporarily present version has GFRP drive shaft Much additional work has done complete set spare parts has built enough build entire second aircraft Bryan has continued physical training designed peak first break weather over English channel Plans suitable hangar near Dover have abandoned since team can set up now five minutes planned move England April Im looking forward big attempt think theyll make Adventures/Harrah continued page 61 gravity seems help projected wing stab area about 2000 sq loading about 10 ounces per square foot flying surface little high weak thermals will have hunt out some boomers long flights short engine runs lighter covering little sanding in-sight weight reduc tion would bring down between 7- 8-pound figure Great thermaling al A1 Packaged 2 Ft Size AND PRICE 5195Ipkg GAP LESS HINGE SLOTTER Makes Slots 4 Sizes Balsa %-Y-Ae /4 PRICE S195 FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 Phone 503 357 2732 though doesnt take away neat sport model 9 pounds no tricks mounting Proctor hardware spring mounted set cables maintain tension 2 4 pounds usually required type slow flying plane faster planes require overcome air pressure control surfaces about 6 pounds used one-spring method others use two two-spring method allows control surface deflection both directions case inadvertently moved reducing potential damage system Proctor fittings give finishing touch scale models very functional needed Naturally already guessed half Sig lumberyard went project availability straight-grained spruce large sheets 1/16 ply made building lot easier Jugs Titebond glue some Devcon Slow Cure epoxy Wilhold R/C56 glue wind shields used put together Williams Bros inverted U spear used guide tail wheel Du-Bro wheels Fox wheel fittings rounded out ground support Well Sunday morning perfect first flight engine started right up test glides range check engine running perfect Checked high low throttle nose held vertical could offer no excuse stay ground moment truth hand Ner vous Taxi fine increased rpm went left over-corrected rudder same time parted company ground surprised about 2/3 throttle airborne about 25 feet happened original design pop-off struts came back earth moment realized heading light standard No J4 sticking out Leroys head winding up picture missed itby inches Regaining some control myself plane put slow right turn left wing panel creasing its dihedral cut throttle off managed just clear trees could keep nose up headed slow right spin gave full left rudder full up elevator hoping pop wheels wheels did hit just before nose damage minor plane major pride Repairs now process snap-off struts being re placed working screw-mounted struts go back next flight time will spent ground taxiing did fly Taylorcraft things con sidered lot achieved learned K&B 61 experiments prop tests Proctor control systems surpassed ex pectations two failings both design other pilot error lucky have little repair learned found K&B engine Taylorcraft can wonderful sport-flying oombination Thanks Sterling Peanut version great old bird we-fly can magnificent horror over have go find Diana Cream Invader/Smith continued page 69 4 Slide tubes fuselage epoxy heavily after roughing od corner file glue areas 5 File end tubes flush side fuselage secure ballast strip plastic tape Radie Installatien 1 Installation shown Kraft radio other radio used essential same structural configuration used side rails cross rails Positions may altered suit radio 2 Shape side rails fit contour fuselage Use Hobbypoxy #2 gluing area Epoxy side rails place Fabricate lay out drill cross rails braces epoxy place 3 Loose-install servos align anchor front end cables control linkages Remove servos 4 Sand center seams fuselage smooth wet-or-dry sand entire fuselage re move orange peel effect gel coat Finishpaint fuselage sand canopy bottom needed obtain good fit cut out rear canopy clear control mechan ism Install hook canopy hooks servo rails Finish paint canopy 5 One Airtronics skid other suitable skid installed Install radio hook up linkages Assemble finished tail surfaces 122 Model Aviation Winning Ideas FOURMOST specialize WINNING Ideas AVIATION JEWELRY Largest Aircraft Jewelry Selection World CUSTOM JEWELRY SPECIALISTS Interested dealers full line airplane jewelry write PO Box 56CM JAddison Dallas Texas 75001 -Ph 214 596 3505 CUSTOM TUNED ENGINES COMPETITION ACCESSORIES Cox 049L051 Specialists brochure send 1 Sc stamp Kustom Kraftsmanship Brochure Box 2699 Laguna Hills CA 92653 714 830-5162